The hardness of the belly bulge above the cesarean section wound is considered to be related to tight knotting, infection, fat liquefaction and other reasons. 1. Too tight knotting: In the process of tying the knot in cesarean section surgery, if the knot is too tight in the subcutaneous tissue, it can lead to the fat layer being squeezed or accumulated, and thus there is a hard knot above the incision. 2. Infection: If the incision of cesarean section is infected, it can lead to the appearance of a hard bump on the stomach above the cesarean section wound. In this case, the epidermal skin will be red and the nodule will usually be painful. Therefore, if the wound becomes infected, it is recommended to treat the wound actively to avoid deterioration. 3. Fat liquefaction: When in the early stage of fat liquefaction, the oily fluid fails to seep out of the wound and accumulates inside the wound, leading to the formation of hard lumps. The appearance of a hard bump on the stomach above the cesarean section wound. If the bump on the stomach above the cesarean section wound persists, you can go to the hospital for a consultation or consultation to deal with the problem under the guidance of a doctor.